h o m e

d o c u m e n t a t i o n

c l a s s h i e r a r c h y

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AdvancedStrokeShaders.h

//
//  Filename         : AdvancedStrokeShaders.h
//  Author           : Fredo Durand
//  Purpose          : Fredo's stroke shaders
//  Date of creation : 17/12/2002
//


//
//  Copyright (C) : Please refer to the COPYRIGHT file distributed 
//   with this source distribution. 
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 2
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//

#ifndef  ADVANCEDSTROKESHADERS_H
# define ADVANCEDSTROKESHADERS_H

# include "BasicStrokeShaders.h"

class LIB_STROKE_EXPORT CalligraphicShader : public StrokeShader 
{
        
public:
  CalligraphicShader (real iMinThickness, real iMaxThickness,
                      const Vec2f &iOrientation, bool clamp);
  virtual ~CalligraphicShader () {}
  virtual void shade(Stroke &ioStroke) const;
protected:
  real _maxThickness;
  real _minThickness;
  Vec2f _orientation; 
  bool _clamp;
};

class LIB_STROKE_EXPORT SpatialNoiseShader : public StrokeShader 
{
public:
  SpatialNoiseShader (float iAmount, float ixScale, int nbOctave, bool smooth, bool pureRandom);
  virtual ~SpatialNoiseShader () {}
  virtual void shade(Stroke &ioStroke) const;

protected:

  float _amount;
  float _xScale;
  int _nbOctave;
  bool _smooth;
  bool _pureRandom;
};

class LIB_STROKE_EXPORT SmoothingShader : public StrokeShader 
{
public:
  SmoothingShader (int iNbIteration, real iFactorPoint, real ifactorCurvature, real iFactorCurvatureDifference,
                   real iAnisoPoint, real iAnisoNormal, real iAnisoCurvature, real icarricatureFactor);
  virtual ~SmoothingShader () {}

  virtual void shade(Stroke &ioStroke) const;

protected:

  int _nbIterations;
  real _factorPoint;
  real _factorCurvature;
  real _factorCurvatureDifference;
  real _anisoPoint;
  real _anisoNormal;
  real _anisoCurvature;
  real _carricatureFactor;
};

class LIB_STROKE_EXPORT Smoother
{
public:
  Smoother (Stroke &ioStroke);
        
  virtual ~Smoother () {}

  void smooth (int nbIterations, real iFactorPoint, real ifactorCurvature, real iFactorCurvatureDifference,
               real iAnisoPoint, real iAnisoNormal, real iAnisoCurvature, real icarricatureFactor);
  void computeCurvature ();

protected:
  real _factorPoint;
  real _factorCurvature;
  real _factorCurvatureDifference;
  real _anisoPoint;
  real _anisoNormal;
  real _anisoCurvature;
  real _carricatureFactor;

  void iteration();
  void copyVertices ();

  Stroke *_stroke;
  int _nbVertices;
  Vec2r *_vertex;
  Vec2r *_normal;
  real *_curvature;
  bool *_isFixedVertex;

  bool _isClosedCurve;
  bool _safeTest;
};

class LIB_STROKE_EXPORT Omitter : public Smoother 
{
public:
  Omitter (Stroke &ioStroke);
  virtual ~Omitter () {}

  void omit (real sizeWindow, real thrVari, real thrFlat, real lFlat);
protected:
  real *_u;

  real _sizeWindow;
  real _thresholdVariation;
  real _thresholdFlat;
  real _lengthFlat;
};

class LIB_STROKE_EXPORT OmissionShader : public StrokeShader 
{
public:
  OmissionShader (real sizeWindow, real thrVari, real thrFlat, real lFlat);
  virtual ~OmissionShader () {}

  virtual void shade(Stroke &ioStroke) const;

protected:

  real _sizeWindow;
  real _thresholdVariation;
  real _thresholdFlat;
  real _lengthFlat;
};

#endif // ADVANCEDSTROKESHADERS_H

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Last modified 3 Mar 2008

© Stephane Grabli